DOCUMENT:Q143138 08-AUG-2001 [winnt] TITLE :Can No Longer Access the Registry with Null Sessions PRODUCT :Microsoft Windows NT PROD/VER:4.0 OPER/SYS: KEYWORDS:kb3rdparty ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 - Microsoft Windows NT Workstation version 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== After you apply the security hotfix (Sec-fix) or Windows NT 4.0 Service Pack 3, which includes this hotfix, applications that use null sessions may no longer work properly. For example, after you apply the security hotfix to a Windows NT computer running Cheyenne ARCServe 6.0, you may receive the following error message when you attempt to schedule a job (for example, local, remote, backup, and restore): User doesn't have enough rights to do this EC=5 CAUSE ===== The updated security modules for Windows NT no longer permit null sessions to access the Windows NT registry. RESOLUTION ========== Perform the following steps to resolve this problem: WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk. 1. Run Registry Editor (Regedt32.exe). 2. Go to the following key in the registry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters\ 3. Add "winreg" (without the quotation marks) to the NullSessionPipes entry. 4. Restart your computer. MORE INFORMATION ================ For more information on the security hotfix (Sec-fix,) please see the following article(s) in the Microsoft Knowledge Base: ARTICLE-ID: Q143474 TITLE : Restricting Information Available to Anonymous Logon Users ARTICLE-ID: Q143475 TITLE : Windows NT System Key Permits Strong Encryption of the SAM ARTICLE-ID: Q161372 TITLE : How to Enable SMB Signing in Service Pack 3 This hotfix is also included with Windows NT 4.0 Service Pack 3. Additional query words: prodnt AS ====================================================================== Keywords : kb3rdparty Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 Version : 4.0 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.